How to add group_id to yeti groom

Development Character & Animation
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help_3_Meerkat.PNG - Google Drive (meerkat)
help_2_Meerkat.PNG - Google Drive (meerkat)
help_1_MyWork.PNG - Google Drive
help_0_MyWork.PNG - Google Drive

I want to know more about group_id.
As shown in the attached picture, I created an Attribute node and clicked the Export Unreal ABC button. However, only one group is imported into Unreal.
am i doing something wrong?
I want to add the group_id as shown at 21:22 in meerkat video.(Creating Realistic Hair and Feathers in Unreal Engine | Webinar - YouTube)

#Importing-Content

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Hello, hopefully you got it working by now, but just in case, you need to create an attribute node with attribute named “groom_group_id” and put default value to the id you want.